Datasheet LT4423 (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | 28V, 2A Ideal Diode and Load Switch |
| 页数 / 页 | 18 / 1 — Data Sheet. LT4423. FEATURES. GENERAL DESCRIPTION. APPLICATIONS. … |
| 文件格式/大小 | PDF / 456 Kb |
| 文件语言 | 英语 |
Data Sheet. LT4423. FEATURES. GENERAL DESCRIPTION. APPLICATIONS. SIMPLIFIED APPLICATION DIAGRAM. TO LOAD. OUT. TA = 25°C. USB PD 3.0
该数据表的模型线
文件文字版本
Data Sheet LT4423
28V, 2A Ideal Diode and Load Switch
FEATURES GENERAL DESCRIPTION
Internal 200mΩ Power Path The LT®4423 is a 1.9V to 28V ideal diode and load switch Wide Operating Voltage Range: 1.9V to 28V with integrated P-channel MOSFETs. When enabled, Reverse Current Protection 15mV forward voltage regulation minimizes power Load Switch Capability dissipation while increasing operating headroom and Low 10µA Quiescent Current efficiency compared to a Schottky diode. Fast 3µs Response to Load Steps Using two LT4423s in diode-OR applications provide a Low 500nA Off State Current seamless transfer to the highest available voltage under Smooth Switchover in Diode-OR Applications varying input supply conditions. A non-enabled LT4423 Integrated Thermal Protection blocks up to 28V in either direction or polarity while 10-Lead (3mm x 2mm x 0.75mm) LDFN Package exhibiting less than 1μA (typical) leakage current, providing orders of magnitude improvement over
APPLICATIONS
typical Schottky diodes, which leads to extended battery life. Schottky Diode Replacement Battery and Wall Adapter Diode ORing Fast OUT to IN reverse bias detection minimizes reverse Backup Battery Diode ORing current, preventing undesired charging of input batteries. The open-drain STATUS output pulls low Industrial and Consumer Hand-Held Applications when the LT4423 is in shutdown, reverse bias, or under thermal protection. Integrated thermal detection protects from overtemperature conditions by disabling the power path. All registered trademarks and trademarks are the property of their respective owners.
SIMPLIFIED APPLICATION DIAGRAM LT4423 2 TO LOAD IN OUT TA = 25°C USB PD 3.0 1 IN = 12V PRIMARY POWER SOURCE C1 5V TO 20V 1µF ) (A T 0.1 ON OFF SHDN STATUS N/C GND EN R R U C D A LT4423 O L 0.01 IN OUT BACK-UP Li-Ion CELL 3.6V R1 2 IN2 THERMAL RELIEF 4.7kΩ D1 0.001 SHDN 10 100 400 GND STATUS DC FORWARD VOLTAGE DROP (mV)
002 001
Figure 1. USB PD 3.0 and Back-Up Battery Supply Figure 2. LT4423 I-V CURVE
Rev. 0
DOCUMENT FEEDBACK TECHNICAL SUPPORT
One Analog Wa y, Wilmington, MA 01887 -2356, U.S.A. Tel: 781.329.47 00 ©2024 Analog Devices, Inc. Al l rights rese rve d. Document Outline Features Applications General Description Simplified Application Diagram TABLE OF CONTENTS Revision History Specifications Absolute Maximum Ratings Pin Configurations and Function Descriptions Typical Performance Characteristics Block Diagram Theory of Operation Applications Information USB PD 3.0 and Back-Up Battery Supply Automatic Power Path Control 5V Power Ride-Through High-Voltage Load Switch with Load Sharing and Undervoltage Lockout Layout and Thermal Considerations Typical Applications High-Load Current Application Reverse Input Voltage Protection Related parts Outline Dimensions Ordering Guide
28V, 2A Ideal Diode and Load Switch
FEATURES GENERAL DESCRIPTION
Internal 200mΩ Power Path The LT®4423 is a 1.9V to 28V ideal diode and load switch Wide Operating Voltage Range: 1.9V to 28V with integrated P-channel MOSFETs. When enabled, Reverse Current Protection 15mV forward voltage regulation minimizes power Load Switch Capability dissipation while increasing operating headroom and Low 10µA Quiescent Current efficiency compared to a Schottky diode. Fast 3µs Response to Load Steps Using two LT4423s in diode-OR applications provide a Low 500nA Off State Current seamless transfer to the highest available voltage under Smooth Switchover in Diode-OR Applications varying input supply conditions. A non-enabled LT4423 Integrated Thermal Protection blocks up to 28V in either direction or polarity while 10-Lead (3mm x 2mm x 0.75mm) LDFN Package exhibiting less than 1μA (typical) leakage current, providing orders of magnitude improvement over
APPLICATIONS
typical Schottky diodes, which leads to extended battery life. Schottky Diode Replacement Battery and Wall Adapter Diode ORing Fast OUT to IN reverse bias detection minimizes reverse Backup Battery Diode ORing current, preventing undesired charging of input batteries. The open-drain STATUS output pulls low Industrial and Consumer Hand-Held Applications when the LT4423 is in shutdown, reverse bias, or under thermal protection. Integrated thermal detection protects from overtemperature conditions by disabling the power path. All registered trademarks and trademarks are the property of their respective owners.
SIMPLIFIED APPLICATION DIAGRAM LT4423 2 TO LOAD IN OUT TA = 25°C USB PD 3.0 1 IN = 12V PRIMARY POWER SOURCE C1 5V TO 20V 1µF ) (A T 0.1 ON OFF SHDN STATUS N/C GND EN R R U C D A LT4423 O L 0.01 IN OUT BACK-UP Li-Ion CELL 3.6V R1 2 IN2 THERMAL RELIEF 4.7kΩ D1 0.001 SHDN 10 100 400 GND STATUS DC FORWARD VOLTAGE DROP (mV)
002 001
Figure 1. USB PD 3.0 and Back-Up Battery Supply Figure 2. LT4423 I-V CURVE
Rev. 0
DOCUMENT FEEDBACK TECHNICAL SUPPORT
One Analog Wa y, Wilmington, MA 01887 -2356, U.S.A. Tel: 781.329.47 00 ©2024 Analog Devices, Inc. Al l rights rese rve d. Document Outline Features Applications General Description Simplified Application Diagram TABLE OF CONTENTS Revision History Specifications Absolute Maximum Ratings Pin Configurations and Function Descriptions Typical Performance Characteristics Block Diagram Theory of Operation Applications Information USB PD 3.0 and Back-Up Battery Supply Automatic Power Path Control 5V Power Ride-Through High-Voltage Load Switch with Load Sharing and Undervoltage Lockout Layout and Thermal Considerations Typical Applications High-Load Current Application Reverse Input Voltage Protection Related parts Outline Dimensions Ordering Guide